As Billboard reports, the soundtrack includes four original songs by McKenzie, including "Life's a Happy Song", a duet between actors Jason Segel and Amy Adams, to which Feist and Mickey Rooney (!) contribute vocals. Newsom, meanwhile, sings on the Jim Henson-penned "Muppet Show Theme".

It's not the first time the Muppets have been met by modern-day indie rockers this year: Disney released Muppets: The Green Album back in August, which featured covers of popular Muppets songs by artists like My Morning Jacket, Andrew Bird, and Weezer. Bird appears on the new soundtrack, too, peforming the track "The Whistling Caruso". The Muppets themselves cover Nirvana's "Smells Like Teen Spirit" and Cee-Lo's "Forget You".

Check out the full tracklisting, and the original "Muppet Show Theme", below.